New York authorities are poring over a serial killer’s vast collection of photos and jewelry found two years ago in a Seattle locker — to see if they match any missing cases here, sources told The Post.

The trove of hundreds of photos belonging to “Dating Game” death-row inmate Rodney Alcala were published by California authorities two years ago.

Alcala, 68, and his US Marshals escort arrived in New York yesterday for the serial slayer’s long-overdue date with East Coast justice.

He’s expected to face a Manhattan Supreme Court judge this morning on charges of murdering two young women here in the 1970s.

“Together with our partners in law enforcement, we are making sure this case and others like it get the attention they deserve,” Manhattan DA Cyrus Vance Jr. said.

“Because no one is entitled to a free murder, they shouldn’t get away with it.”

Alcala has been on death row in California since he was convicted there in 2010 of strangling four women and a 12-year-old girl in the 1970s.

In New York, one of Alcala’s alleged victims, TWA flight attendant Cornelia Crilley, 23, was raped in her Upper East Side apartment in 1971.

She was strangled with her own pantyhose, sources said.

She had moved in the day before.

Alcala earned his moniker because he once appeared on a 1978 episode of “The Dating Game”— amid his killing spree.